However, as avid puzzlers ourselves, we put together a list focuses on what we've found as the most challenging yet rewarding puzzles with adults in mind, and even included some 3D gems in the mix.

Have you ever been about to finish a puzzle, when suddenly you realize there are more holes left than you have pieces? With [Nikolaos’s] 3D printed sliding puzzles, this will be a problem of the ...

With almost 2,500 pieces, measuring 30 metres and weighing 25 tonnes, it has been called the world's largest 3D puzzle. Archaeologists can now, after 20 years of painstaking restoration ...

With the box, you can easily arrange by colors and begin doing each square as a mini-puzzle, toning down the difficulty. A 3D puzzle seems like it would be harder on the surface. Building in two ...